/*
 * Copyright (c) 2013, 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package org.graalvm.visualizer.source.impl;

import org.openide.cookies.EditorCookie;
import org.openide.util.lookup.ServiceProvider;
import org.openide.windows.Mode;
import org.openide.windows.ModeSelector;
import org.openide.windows.TopComponent;
import org.openide.windows.WindowManager;

import javax.swing.JEditorPane;
import javax.swing.SwingUtilities;

/**
 *
 */
@ServiceProvider(service = ModeSelector.class, position = 5000)
public class EditorModeSelector implements ModeSelector {
    @Override
    public Mode selectModeForOpen(TopComponent tc, Mode preselectedMode) {
        if (!preselectedMode.getName().contains("mainArea")) {
            return null;
        }
        EditorCookie cake = tc.getLookup().lookup(EditorCookie.class);
        if (cake == null) {
            return null;
        }
        // must find a more suitable Mode. Find something which has already 'editor' TC in it
        for (Mode m : WindowManager.getDefault().getModes()) {
            for (TopComponent opened : WindowManager.getDefault().getOpenedTopComponents(m)) {
                cake = opened.getLookup().lookup(EditorCookie.class);
                if (cake != null) {
                    JEditorPane[] panes = cake.getOpenedPanes();
                    if (panes != null) {
                        if (SwingUtilities.isDescendingFrom(panes[0], opened)) {
                            return m;
                        }
                    }
                }
            }
        }
        // attempt to find the editor area:
        return WindowManager.getDefault().findMode("editor");
    }
}
